Bicounty On your harmonic balancer bolt you could take a short section of 1 1/4 round stock and make a guide for your tap drill,put it in the harmonic balancer bore,drill your hole stralght in there,tap the hole,put it together using a grade 8 bolt. One word of caution dont drill into oil passage in the crank. Take your time and have sharp tools,with real cutting oil .
